Version 7.2
647
Mediant 500 MSBR
User's Manual
32. SBC Overview
Parameter Value
SIP Header Present in Received SIP Message
Diversion
History-Info
Diversion and History-Info
DiversionMode = Add
Diversion.
History-Info
removed.
HistoryInfoMode =
Disable
DiversionMode = Add
Diversion
converted to
History-Info.
Not present.
Diversion added to History-Info.
HistoryInfoMode =
Disable
DiversionMode = Add
Not present.
History-Info
converted to
Diversion.
History-Info added to Diversion.
HistoryInfoMode = Add
DiversionMode = Add
Diversion
converted to
History-Info.
History-Info
converted to
Diversion.
Headers are synced and sent.
HistoryInfoMode =
Remove
DiversionMode =
Remove
Diversion
removed.
History-Info
removed.
Both removed.
32.8.3 Interworking SIP REFER Messages
The device supports interworking of SIP REFER messages. SIP UAs may support different
versions of the REFER standard while others may not even support REFER.
This feature supports the following:
Attended, unattended, and semi-attended call transfers
Sending INVITE, REFER-notifications, BYE, PRACK and Session Timer on behalf of
peer PBXs
Advanced routing rules for the new, initiated INVITE
Forwarding early media after REFER while attempting to avoid transcoding (by
sending session update)
Interoperate with environments were different SIP UAs lack basic SIP functionality
such as re-INVITE, UPDATE, PRACK, Delayed Offer, re-INVITE without SDP
Session updates after connect to avoid transcoding
The handling of REFER can be configured for all calls, using the global parameter
SBCReferBehavior. To configure different REFER handling options for different UAs (i.e.,
IP Groups), use the IP Profiles table parameter, 'Remote REFER Mode'.
Local handling of REFER: This option is used for UAs that do not support REFER.
Upon receipt of a REFER request, instead of forwarding it to the IP Group, the device
handles it locally. It generates a new INVITE to the alternative destination according to
the rules in the IP-to-IP Routing table (where the 'Call Trigger' field is set to
REFER
). It
is also possible to specify the IP Group that sent the REFER request, as matching
criteria for the re-routing rule in this table ('ReRoute IP Group ID' field).
Transparent handling: The device forwards the REFER with the Refer-To header
unchanged.
Re-routing through SBC: The device changes the Refer-To header so that the re-
routed INVITE is sent through the SBC application.
Summary of Contents for Mediant 500 MSBR
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Page 45: ...Part II Management Tools ...
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Page 115: ...Part III General System Settings ...
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Page 137: ...Part IV General VoIP Configuration ...
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Page 455: ...Part V Gateway Application ...
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Page 625: ...Part VI Session Border Controller Application ...
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Page 741: ...Part VII Cloud Resilience Package ...
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Page 751: ...Part VIII Data Router Configuration ...
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Page 757: ...Part IX Maintenance ...
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Page 837: ...Part X Status Performance Monitoring and Reporting ...
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Page 927: ...Part XI Diagnostics ...
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Page 977: ...Part XII Appendix ...
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